Machine foe drilling and tapping metal castings



(No Model.) 4 Sheets-Sheet 1.

' J. DE D. TEJADA. MACHINE FOR DRILLING AND TAPPING METAL GASTINGS.

No. 593,622 Patented Nov. 16, 1897.

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(No Model.) 4 Sheets-Sheet 2 J. DE D. TEJADA.

MACHINE FOR DRILLING AND TAPPING METAL GASTINGS. No. 593,622. Patented Nov. 16, 1897.

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J. DE D.- TEJADA. MACHINE FOR DRILLING AND TAPPING METAL GASTINGS.

N0. 593;622'. Patented Nov. 16, 1897.

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(No Model.) 4 Sheets-Sheet 4.

J.'DE D. TEJADA. x MACHINE FOB. DRILLING AND TAPPING METAL GASTINGS.

No. 593,622. Patented Nov. 16, 1897;

' PATENT since.

JUAN DE D. TEJADA, OF NEW YORK, N. Y.

MACHINE FOR DRILLING AND TAPPING METAL CASTINGS.

SPECIFICATION forming part of Letters Patent No. 593,622, dated November 16, 1897. Application filed December 26, 1896. Serial No. 616,996. (No model.)

ings and other articles.

In this application I have illustrated. the invention as embodied in a machine for drilling and tapping the cast bodies for valves of the class ordinarily known as globe valves,

' but I do'not confine the invention specifically to the tapping of any special kinds of castings. I

The machine illustrated-and described in this application comprises a revoluble frame carrying a series of chucks for holding the valve-bodies to be drilled and tapped, a set of three drills heldin the ends of revoluble spindles and adapted to have imparted simultaneous revoluble motion to them for the purpose of simultaneously drilling the valvebodies one after another in succession as presented to them, a set of three taps with mechanism for imparting the proper simultaneous revoluble motion to them for tapping the valve-bodies in succession as presented to them after said bodies have been prepared by the drills and while still held in the chucks mounted on the aforesaid revoluble frame means for locking the frame carrying the chucks while the drills and taps .are acting upon the valve-bodies, and other features of construction and other combinations of parts, allot which will be described in detail hereinafter.

The invention consists in the novel features of construction and combinations of parts hereinafter described, and particularly pointed out in'the claims.

Referring to the accompanying drawings, forming a part of this application, Figure 1 is a front elevation, partly in section, of a machine constructed in accordance with and embodying the invention. Fig. 2 is a detached side elevation of the revoluble frame carrying the chucks for holding the castings While being drilled and tapped. Fig. 3 is a detached side elevation of an eccentric forming a part of the mechanism disclosed at the upper end of Fig. 1. Fig. 4 is a top view of the body of the machine, the upper portion of the machine being removed on the sectional line 4 4 of Fig. 1. Fig. 5 is-an enlarged detached sectional view of one of the pulleys 0.11 the shaft carrying one of the drills and illustrating the feather by which said shaft and pulley are connected to revolve together without interfering with the longitudinal reciprocation of said shaft within the hub of said pulley. Fig. 6 is a detached vertical section through a grooved block upon the drill shaft or spindle and through which by means of suitable levers the spindle is caused to have a reciprocating motion toward and from the valve-body being drilled. Fig. 7 is an end elevation of the machine and discloses two modifications of certain of the details thereof, one modification being as to the lever at the upper end of the machine for causing the drills, to simultaneously approach the casting and the other modification being the application of a foot-treadle for causing the taps toapproach the casting in lieu of the hand-lever for this purpose shown in Fig. 4.

Fig. '8 is a vertical section through a portion of the machine on the dotted line 8 8 of Fig. 7 this figure being presented'to illustrate the gear-wheels by which motion is communicated from one of the tap spin'dles to the other two tap-spindles. Fig. 9 is an enlarged detached perspective View of a pair of interengaging worm-wheels by which motion is communicated from the driving-shaft to one of the tapping shafts or spindles, and Fig. 10 is a detached sectional view through the valve body and showing the three taps in position within the same.

In the drawings, A designates the main body or frame, supporting the operative parts of the machine; B, the revoluble frame, carrying the chucks O for holding the castings F; E E E, the drills by which the valve-body (lettered F) is drilled, and G G Gr the three taps by which the screw-threads are formed in the necks of the said valve-body F after the latter has left the drills E. The drills are located at the front of the machine in vertical central alinement with the axial'center of the chuck-holding frame B, and the taps G are located at the rear of the machine in horizontal alinement with the axial center of the holding-frame. The chuck-holding frame B is mounted upon and revolves with the spindle or shaft H, which is mounted in bearings I I, formed in the supporting-body A of the machine, as clearly illustrated in Fig. 1, and said frame B, as shown more clearly in Fig. 2, has the series of guides J formed thereon or secured thereto, if desired, which guides are of well-known construction and support the chucks C, which comprise the sliding jaws K K, adapted to move back and forth in the guides J and to securelygrasp the valvebodies or other castings F, as indicated in Fig. 2. The chucks C are operated to grasp or free the valve-bodies F by means of the customary screws L, which will be rotated by any convenient means-as, for example, by means of the key or wrench M. (Shown in position in Fig. 7.) The frame B is in the nature of a wheel having flattened sides to receive the chucks G, and said frame revolves inward toward the rear portion of the machine. the frame B is such that a given circle struck from the center of the spindle or shaft II will pass through the centers of the valve-bodies F, held by said chucks, as denoted by the circle traversing said valve-bodies F in Fig. 2. The chuck-holding frame B will be revolved by hand and will be stopped at the end of each quarter-revolution by the engagement of the upwardly-acting spring-pin N with the notches in the plate 0, carried upon the end of theshaft or spindle H for the chuck-holding frame B. The pin N is mounted in the guides P P and is encompassed by the coiled spring Q, which imparts an upward tension to said pin N. The pin N is maintained normally in contact with the plate 0 by means of said spring Q and is released from said plate 0, so as to permit of afurtherquarterrevolution of the chuck-holding frame B by means of the pivoted foot-treadle R. (Shown more clearly in Fig. '7 The chuck-holding frame B is usedv for feeding the valve-bodies or other castings F inward to the drills and then to the taps and in properly holding said valve-bodies or other castings during the drilling and tapping operations. The valvebodies or other eastin gs F will be applied to the chucks O by hand and will be removed from said chucks by hand after the drilling and tapping operations have been completed, and the finished castings are drawn outward to the front of the machine by the continued intermittent revoluble motion of the frame B.

At the front portion of the main frame A of the machine is formed the vertical casting S, which arches over the chuck-holdin g frame B and receives the spindles or shafts T V XV, respectively, at whose adjoining ends are secured the drills E E E of known form and construction. The shafts T VVV are at right angles to one another and at theirinner ends The arrangement of the chucks C on approach one another, the shafts T \V being horizontal shafts in alinement with one another and the shaft B being a vertical shaft and on the same vertical plane as the shafts T W and extending downward 011 a line centrally between the inner ends of the shafts T V. The shaft or spindle T is mounted in the journals X and carries the driving-power wheel Y, the belt-wheel Z, and the grooved block or head a, the details of the latter being illustrated in Fig. 6. The pulley-wheel Z is keyed upon the shaft T, so as to rotate with said shaft, but not interfere with the sliding movement of the same, as illustrated in Fig. 5, and likewise the power driving-pulleys Y are keyed upon the shaft T, so as to impart motion to said shaft from a suitable driving-belt without interfering with the longitudinal sliding motion of said shaft T. The head or block a upon the shaft T is the means through which from suitable levers, to be hereinafter described, the shaft T is given its longitudinal sliding motion without interfering with the revolving of said shaft. The shaft W carries at its inner end the drill and is mounted to revolve and slide longitudinally within the journals 1), as shown in Fig. 1. Upon the shaft W is mounted the pulley-wheel 61, corresponding with the wheel Z on the shaft T, and also the head or block e, which corresponds with the head or block a on the shaft T. The shaft XV may have a sliding movement through the pulley d without interfering with the revoluble motion of said shaft and pulley. The vertical shaft V is mounted to revolve within the journals f and to move vertically within said journals, and said shaftVhas upon its upper end (see Fig. 1) the plate g, between which and the upper end of the journal fis arranged the coiled spring h, which imparts a normal upward tension to said shaft V, whereby the drill E, carried by said shaft V, has a normal tendency to leave the valve-body F. Upon the shaft or spindle V is applied the pulleywheel i, receiving the belts 76, the former of which passes around said pulley-wheel'i and the pulley-wheel Z on the shaft T and communicates motion from said shaft T to said pulley-wheel i, and thence to the vertical shaft or spindle V. The belt passes around the pulley-wheel i and also the pulley-wheel d on the shaft or spindle TV, and thereby motion is communicated from the said pulley-wheeM to the said pulley-wheel d, and thence to the shaft or spindle TV and the drill carried thereby. Thus the motion imparted to the shaft T from the driving-pulleys Y is first communicated to the vertical shaft V, and thence to the horizontal shaft \V. The belts j 70 pass over the idlers m m in order that they may have the proper direction.

The power applied to the shaft T and from said shaft communicated to the shafts V and W is to effect the proper rotation of the drills E, and the means for causing the said drills to simultaneously approach and act upon the valve-body is effected in Fig. l by means of the hand-lever n and eccentric 0, the latter engaging thehead p and serving thereby to drive downward the jointed levers q r, the former of which engages the lever s, acting on the head or block a, while the latter or leverr is pivotally connected to the upper end of the lever t, which at its lower end engages the head or block e, as shown in Fig. 1. When the eccentric 0 presses downward the jointed levers q r, the outer ends of the latter levers will move outward, and thereby cause the lower ends of the levers s t to move inward, as shown by dotted lines in Fig. 1, whereby the heads or blocks a e and the shafts or spindles T W will be moved inward to carry the drills E against the valve-casing F. Simultaneously with the inward movement of the shafts or spindles T W the eccentric 0, acting through the head p, presses downward on the vertical shaft or spindle V, and hence the three shafts or spindles T V W simultaneously approach the valve-casing F and effect the proper drilling of the said casing F at the three points indicated. The pressure of the drills E upon the casing F is'under the direct control of the operator, whose hand will be upon the lever n. After the said valve-casing F has been properly drilled and faced the lever n will be turned to free the eccentric 0 from the head 10, and the spring It will at such time throw the shaft V upward and, through the levers q r s t, cause the heads or blocks a e to move the shafts T W outward, thereby removing all of the drills from the valve-casing F.

The drills E operate upon the cast body F, at the time located at the upper side of the revoluble chuck-carrying frame B, and said drills, owing to the special arrangement of transmitting mechanism shown, all turn simultaneously with one another and in the proper direction to do the drilling and facing of the cast body F. The upper drillE will ordinarily be of sufficient length to pass entirely within the cast body F and drill the valveseat thereof,'while the two side drills E will simply be of sufficient length to drill the neck of the castbody F.-

In Fig. 1 the lever 01. and eccentric o are utilized for moving the drills E toward one another and the spring his provided for moving the said drills outward from one another, but the invention is not limited to the special lever 77. and eccentric 0 (shown in Fig. 1) for this purpose, and hence in Fig. 7 I illustrate a modified form of means for actuating the intermediate parts to move the drills inward and then outward, and in said Fig. 7 it will be observed that I provide alever w, having a slot 50 to receive a pin y, connected with the upper end of the vertical shaft or spindle V, and that the movement of said lever/w will depress the .said spindle or elevate the same in accordance with the direction of its movemerit, both movements of the spindle V bemeans for the lever n, eccentric 0, and spring h. (Shown in Fig. 1.) After the cast body F, then located at the upper side of the frame B, has'been acted upon by the drills E and the latter have been retracted therefrom, the stop-pin N will be released from the plate 0 and the frame B will'be given a one-quarter turn, thereby causing a rough casting to be turned upward for treatmentby the drills E and the drilled casting formerly at the top of the frame B to be carried rearward in position to be acted upon by the taps G, as shown in Fig. 4.. The three taps G have simultaneous motion, and the said taps G are respectively mounted upon the spindles A, B, and O, the spindles A 0 being inhorizontal alinement with one another and the spindle B being at right angles to the axial center of the spindles A G and centrally on the line of the transverse center between the adjoining ends of said spindles A O. The spindle or shaft A receives the power from a suitable belt through the driving-pulleys D and carries at its, inner end the tap G. Upon' the shaft or spindle A is provided the head or block E and also the right-hand worm-wheel F, the latter being in engagement with the right-hand worm-wheel G, which is mounted upon the shaft I'I, having at its rear end the gear-wheel I, which, as'shown in Figs. 4: and 8, is in mesh with the intermediate gearwheel J, the latter being in engagement with the gear-wheel K, mounted on the spindle or shaft L, which carries the left-hand worm wheel M, as shown in Figs. 4 and 9, this worm-wheel M being in mesh with the lefthand worm-wheel N, which is secured upon the said shaft 0, at whose inner end is carried the tap G and adjacent to whose outer end is provided the head or block 0, corresponding with the head or block E on the shaft or spindle A.

aforesaid gear-wheel J and also the middle tap G. The power communicated to the shaft A from the driving-pulleys D rotates the said shaftA with the tap G, carried thereby,

and through the intermeshing worm-wheels F G imparts motion to the shaft H and gearwheel I, the effect of which is to impart rotary movement through the gear-wheel J to the shaft B and then through the gear-Wheel K, shaft L, and worm-wheel M to the wormwheel N and shaft 0. Thus from the driving-pulley D there is communicated simultaneous motion to the three taps G, all moving in, the proper direction for tapping the neck of the casting F. The shafts A B 0, like the shafts T V V, may have a sliding movement without interfering'with their rotary movement, and the sliding movement of the shafts A B O is necessary in order that the taps G may enter the casting F while rotating andrecede fromsaidcasting whilejrotating, the movement of the taps being in IIOI The shaft or spindle B carries the I one direction while entering the casting F and in the reverse direction when leaving the said casting. The approach of the three taps G toward one another and toward the casting F is effected in Fig. 4 by means of the hand-lever P and eccentric Q, the latter acting upon the head R, to which the jointed levers S T are pivoted. The lever S is pivotally secured to the lever V, whose lower end engages the head or block E on the shaft A, and the lever T at its outer end is pivoted to the lever \V, whose lower end or portion engages the block 0' on the shaft 0. The inward movement of the eccentric Q will drive the head R inward and cause the outer ends of the levers S T to spread outward, this having the effect of moving the inner ends of the levers V \V inward and causing the shafts A C to approach one another and effect the engagement of their taps G with the casting F. The inward move ment of the eccentric Q also drives the head R against the shaft or spindle B, and this effects the inward movement of said shaft B and its tap Gsimultaneously with the inward movement of the shafts A O with their taps G. It will thus be observed that the three necks of the casting F receive the taps G simultaneously and that the tapping of the entire casting is accomplished at one operation. As soon as the taps G have sufficiently entered the casting F the motion of the belt on the wheel D will be reversed, so that the motion of all of the shafts A B C will be reversed and the taps G unscrewed from the casting F, at this time the eccentric Q being thrown entirely clear of the head R. While the tapping of the casting F is taking place, as illustrated in Fig. 4, the rough casting which when the drilled casting was turned rearward came to the top of the frame B will be drilled by the means hereinbefore described preparatory to the next turning of the frame B, which will move the tapped casting downward and the drilled casting to the rear in proper position with relation to the taps G to receive the same. As soon as a casting has approached to the front of the machine, due to the rotation of the frame B, it will be removed from the chuck C and a rough casting substituted in its place, which rough casting will during the intermittent rotation of the frame B be carried inward first to the drills E and then to the taps G.

In lieu of moving the head R inward by means of the eccentric Q and hand-lever P the same effect may be produced,.if desired, by the foot-treadle X, (shown in Fig. 7,) whose upper en d, carrying a roller Y, will engage the head R. The foot-treadle X is shown in Fig. 7 merely as an equivalent mechanism for performing the functions of the eccentric Q and lever P. (Illustrated in Fig. 4.)

The drilling and tapping operations are carried on simultaneously While the castings or bodies F are held by the one frame B, and

during these operations the horizontal drills and taps are working in opposing directions and have no tendency to move the castings or bodies F from the frame B, and the central drills and taps exert their force in a direction pressing the castings or bodies F directly upon the said frame B and directly in line with the axial center of same, and hence the construction and arrangement of the parts of the machine made the subject hereof are such as to insure the best results and the production of a machine capable of withstanding long continued use. The invention is not confined, however, to the treatment of the castings or bodies F having three necks to be drilled and tapped, but comprises the treatment of the usual and various kinds of castings for valve-bodies and other purposes.

The invention is not limited in every instance to a machine comprising both drills and taps, although I prefer that the drilling and tapping be performed on one and the same machine, and to this end the revoluble frame B is adapted to carry the castings or valve-bodies for both the drills and taps.

Without limiting myself unduly to the details of construction, what I claim as new, and desire to secure by Letters Patent, is-

1. In a machine of the character described, the frame for holding the casting to be acted upon, combined with the two horizontal shafts or spindles in alinement with one another, a third shaft or spindle intermediate said horizontal spindles and at right angles thereto, the tools carried at the converging ends of said shafts or spindles, means for imparting revoluble motion to one of said shafts and means directly connecting said powershaft with the other two shafts so that motion will be communicated directly from the said power-shaft to the other two shafts, combined with the series of jointed levers connecting said shafts or spindles, means for manually moving one of said shafts so that the motion thereof will be communicated through said jointed levers to the other two shafts to cause the reciprocation of the latter, and means for imparting through said levers an opposite reciprocating motion to said shafts or spindles from that caused by said manually-operated means; substantially as set forth.

2. In a machine of the character described, the two horizontal shafts or spindles in alinement with one another,the third shaft or spindle intermediate said two horizontal shafts or spindles and extending at right angles to the latter, the drilling-tools carried at the con verging ends of said shafts or spindles, the frame for holding the casting to be acted upon by said tools, means for applying power to one of said shafts or spindles, means directly connecting said three shafts or spindles in order that power from the driven shaft or spindle may be directly communicated to the other two shafts or spindles, the series of levers connecting said shafts for imparting reciprocating motion from one of said shafts to I the frame for holding the casting to be acted upon, the two horizontal shafts or spindles in alinement with one another and with said casting, the tools carried by the facing ends of said shafts or spindles, a belt-wheel'directly applied to one of said shafts, driving mechanism directly connecting said two shafts so that power may be transmitted from the driven shaft to the other shaft, and the series of levers connecting said shafts, combined with the cam and lever mechanism acting on said levers to impart to said shafts a simultaneous motion toward the casting, and the spring acting on said levers to impart to said shafts a simultaneous motion from said casting substantially as set forth.

4:. In a machine of the character described, the movable frame holding the castings-tobe acted-on, the two horizontal shafts in alinement with one another and with the casting, and the tools carriedby the facingends of said shafts, combined with the power-wheel directly applied upon one of said shafts, driving mechanism connecting said shafts so that the driven shaft may impart motion to the other shaft, the series. of levers connecting said shafts, the lever and cam mechanism to be operated manually for actuating said levers to move said shafts inward toward the casting without interfering with their revoluble motion, the spring for acting on said levers to move said shafts outward from said casting,and means for locking said frame carrying the castings in position to insure the retention of said casting in line with said tools; substantially as set forth.

5. In a machine of the character described, the three shafts or spindles carrying at their converging ends the drilling-tools, the driving-wheel applied to one of said shafts or spindles, driving mechanism directly con necting said three shafts or spindles in order that the power of the driven shaft or spindle may be communicated to the other two spindles, the series of levers connecting said shafts or spindles for imparting simultaneous reciprocating motion to the same, means acting on said levers at a given point to move them and through them said shafts or spindles, the movable frame carrying the castings to be acted upon, and means for locking said frame in position, combined with the three additional shafts or spindles, the tap ping-tools carried at the converging ends of said additional shafts or spindles, gearing connecting said additional shafts or spindles in order that power from one of them may be communicated to the other two of them, the power-wheel applied to one of said additional shafts or spindles, the series of levers connecting said additional shafts or spindles, and means for acting on said series of levers from a given point to actuate them to effect the reciprocation of said additional shafts or spindles; substantially as set forth.

6. In a machine of the character described, the three converging shafts or spindles having at their ends the drilling-tools, means for imparting a simultaneous rotating motion to said shafts or spindles, and means for reciprocating said shafts or spindles toward and from the casting to be acted upon, combined with the frame holding the castings to be acted upon, the three additional converging shafts or spindles, the tapping'tools at the converging ends of said additional shafts or spindles, a power-wheel applied to one of said additional shafts or spindles, gearing directly connecting said three additional shafts or spindles in order that the driven shaft may communicate motion to the other two shafts or spindles, the series of jointed levers connecting said additional three shafts or spindles, and means for acting on said jointed levers from agiven point to impart simultaneous reciprocating motion to said three additional shafts or spindles toward and from the casting to be acted upon by the tapping-tools; substantially as set forth.

7. In a machine of the character described, the three converging shafts or spindles having at their ends the drilling-tools, means for imparting a simultaneous rotating motion to said shafts or spindles, and means for reciprocating said shafts or spindles toward and from the casting to be acted upon, combined with the movable frame for holding the castings to be'acted upon, means for looking said frame, the three additional shafts or spindles, the tapping-tools at the converging ends of said additional shafts or spindles, the series of levers connecting said additional shafts or spindles for imparting simultaneous reciprocatory movement to them, means for applying power to one of said additional shaftsor spindles, and the gear-wheels substantially as described directly connecting said three additional shafts or spindles for imparting motion to two of said shafts or spindles from the driven shaft or spindle; substantially as set forth.

Signed at New York, in the county of New York and State of New York, this 15th day of December, A. D. 1896.

JUAN DE D. TEJADA.

Witnesses:

CHAS. C. GILL, E. J os. BELKNAP. 

